/* Diagram Layout - Collapsible Sidebar */

:root {
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 60px;
  --sidebar-transition: 0.25s ease;
}

/* Custom Scrollbar - Dark Theme */
* {
  scrollbar-width: thin;
  scrollbar-color: #404040 transparent;
}

*::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

*::-webkit-scrollbar-track {
  background: transparent;
}

*::-webkit-scrollbar-thumb {
  background: #404040;
  border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
  background: #525252;
}

*::-webkit-scrollbar-corner {
  background: transparent;
}

/* Sidebar Toggle Button */
.sidebar-toggle {
  position: fixed;
  left: var(--sidebar-width);
  top: 16px;
  width: 28px;
  height: 28px;
  background: #2d2d2d;
  border: 1px solid #404040;
  border-radius: 6px;
  cursor: pointer;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: left var(--sidebar-transition), background 0.15s;
  transform: translateX(-50%);
}

.sidebar-toggle:hover {
  background: #404040;
}

.sidebar-toggle svg {
  width: 16px;
  height: 16px;
  stroke: #fff;
  transition: transform 0.25s;
}

/* Collapsed state */
body.sidebar-collapsed .sidebar-toggle {
  left: var(--sidebar-collapsed-width);
}

body.sidebar-collapsed .sidebar-toggle svg {
  transform: rotate(180deg);
}

/* Sidebar */
.diagram-sidebar {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: #1a1a1a;
  border-right: 1px solid #2d2d2d;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 40;
  transition: width var(--sidebar-transition);
}

body.sidebar-collapsed .diagram-sidebar {
  width: var(--sidebar-collapsed-width);
}

/* Sidebar content fade */
.sidebar-header,
.sidebar-nav,
.sidebar-footer {
  opacity: 1;
  transition: opacity 0.15s;
}

body.sidebar-collapsed .sidebar-header h1,
body.sidebar-collapsed .sidebar-header p,
body.sidebar-collapsed .nav-group-title,
body.sidebar-collapsed .nav-link span,
body.sidebar-collapsed .back-link span:last-child {
  opacity: 0;
  visibility: hidden;
}

body.sidebar-collapsed .sidebar-header {
  padding: 16px 12px;
}

body.sidebar-collapsed .sidebar-nav {
  padding: 8px;
}

body.sidebar-collapsed .nav-link {
  padding: 10px;
  display: flex;
  justify-content: center;
}

body.sidebar-collapsed .sidebar-footer {
  padding: 8px;
}

body.sidebar-collapsed .back-link {
  padding: 10px;
  justify-content: center;
}

/* Nav link icons for collapsed state */
.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-link-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

/* Main content */
.diagram-main {
  margin-left: var(--sidebar-width);
  padding: 32px;
  min-height: 100vh;
  transition: margin-left var(--sidebar-transition);
}

body.sidebar-collapsed .diagram-main {
  margin-left: var(--sidebar-collapsed-width);
}

/* Tooltip for collapsed state */
body.sidebar-collapsed .nav-link {
  position: relative;
}

body.sidebar-collapsed .nav-link::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: #333;
  color: #fff;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s;
  pointer-events: none;
  z-index: 100;
}

body.sidebar-collapsed .nav-link:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Fullscreen diagram modal */
.diagram-fullscreen-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  display: none;
  flex-direction: column;
}

.diagram-fullscreen-overlay.active {
  display: flex;
}

.diagram-fullscreen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: #1a1a1a;
  border-bottom: 1px solid #2d2d2d;
}

.diagram-fullscreen-header h3 {
  color: #fff;
  font-size: 18px;
  font-weight: 600;
}

.diagram-fullscreen-controls {
  display: flex;
  gap: 8px;
}

.diagram-fullscreen-btn {
  padding: 8px 12px;
  background: #2d2d2d;
  border: 1px solid #404040;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s;
}

.diagram-fullscreen-btn:hover {
  background: #404040;
}

.diagram-fullscreen-btn.close-btn {
  background: #ef4444;
  border-color: #ef4444;
}

.diagram-fullscreen-btn.close-btn:hover {
  background: #dc2626;
}

.diagram-fullscreen-content {
  flex: 1;
  overflow: auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-fullscreen-content .mermaid-container {
  transform-origin: center center;
  transition: transform 0.1s ease-out;
}

/* Zoom indicator */
.zoom-indicator {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: #1a1a1a;
  border: 1px solid #2d2d2d;
  border-radius: 8px;
  padding: 8px 16px;
  color: #888;
  font-size: 13px;
  z-index: 1001;
  display: none;
}

.diagram-fullscreen-overlay.active .zoom-indicator {
  display: block;
}

/* Expand button on diagram sections */
.diagram-expand-btn {
  padding: 6px 12px;
  background: #2d2d2d;
  border: 1px solid #404040;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s;
}

.diagram-expand-btn:hover {
  background: #0d9488;
  border-color: #0d9488;
}

.diagram-expand-btn svg {
  width: 14px;
  height: 14px;
}